1. Andargie A, Reddy UN (2007a) Fitted fourth-order tridiagonal finite difference method for singular perturbation problems. Appl Math Comput 192:90–100
2. Andargie A, Reddy YN (2007b) An exponentially fitted special second-order finite difference method for solving singular perturbation problems. Appl Math Comput 190:1767–1782
3. Ashi HA, Cummings LJ, Matthews PC (2010) Exponential time differencing methods: stability analysis and application to the nonlinear Schrodinger equation. Int J Numer Methods Appl 4(2):99–128
4. Aziz T, Khan A (2002) A spline method for second-order singularly perturbed boundary value problems. J Comput Appl Math 147:445–452
5. Bender CM, Orszag SA (1978) Advanced mathematical methods for scientists and engineers. McGraw-Hill, New York